Most problems, if you give them enough time and space, will eventually wear themselves out. --Buddha
This is comforting. Focusing on a problem adds vibrational energy to it, keeps it hanging around, and even makes it grow. Withdrawing attention from it allows it to dissipate--wear itself out. This is not to say that we should simply ignore problems, but rather to focus on the solution instead. As Einstein stated, "No problem can be solved from the same level of consciousness that created it."